According to the release notes, the new Radeon Software Adrenalin 2019 Edition 19.5.1 driver has support for Bethesda's RAGE 2 game and improves performance in that game by up to 16 percent on a Radeon VII graphics card. It also adds support for Microsoft's Windows 10 May 2019 Update, and adds Instruction Tracing for Radeon GPU Profiler 1.5.X.
There are several bug fixes included with the Radeon Software Adrenalin 2019 Edition 19.5.1 driver, including fix for intermittent flicker with performance metrics overlay when playing back protected content, fix for Doom application hang on AMD XConnect configurations, fix for issue with Radeon Software installation on HD 7970, fix for hot-plugging 8K displays on RX 400 and RX 500 series graphics cards, fix for connection or detection issues with HTC VIVE in OS or SteamVR, various other display issues, AMD Link issues, and texture flickering and corruption in various games with Radeon RX Vega series on Vulkan API.
The new Radeon Software Adrenalin 2019 Edition 19.5.1 driver is available for 64-bit Windows 10 and Windows 7, and supports all Radeon graphics cards since HD 7700/7900, Mobility Radeon series from HD 7700M/7900M, and various AMD processors with Radeon Graphics.
You can check out full release notes as well as find download links over at AMD's support page.